CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net loss	$ (6,673)	$ (2,649)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,851	6,259
Stock-based compensation	944	1,184
Interest expense related to amortization of debt discount and debt issuance costs	430	129
Provision for doubtful accounts	178	57
Provision for excess and obsolete inventory	713	1,698
Deferred income tax (benefit) expense	106	(204)
Other noncash items	(335)	285
Changes in operating assets and liabilities:
Restricted cash	(17,750)	0
Accounts receivable	2,560	(674)
Inventories	(1,239)	(3,387)
Prepaid expenses and other current assets	(72)	394
Other assets	(128)	39
Accounts payable	4,036	897
Accrued expenses and other	(3,984)	(4,318)
Deferred revenues	(18)	(46)
Net cash used in operating activities	(16,381)	(336)
Investing activities:
Purchases of property and equipment	(1,794)	(2,519)
Purchase of intangible assets	0	(250)
Cash received from sale of assets	300	0
Net cash used in investing activities	(1,494)	(2,769)
Financing activities:
Borrowings under lines of credit	39,021	34,669
Repayments under lines of credit	(36,601)	(33,497)
Principal payments on capital lease obligations	(120)	(124)
Proceeds from notes payable	19,500	0
Principal payments on notes payable	(1,488)	(630)
Net cash provided by financing activities	20,312	418
Effect of exchange rate changes on cash	(18)	(261)
Net increase (decrease) in cash	2,419	(2,948)
Cash at beginning of period	21,345	22,241
Cash at end of period	23,764	19,293
Supplemental disclosure of cash flow information:
Cash paid for interest	1,189	936
Cash paid for income taxes	142	958
Purchases of property and equipment in accounts payable	1,711	3,768
Non-cash debt discount	500	0
Initial fair value of warrant liability	$ 10,368	$ 0